Equal: Difference between revisions

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__NOTOC__
__NOTOC__
<h1> {equal} &mdash; Test Values For Equality &mdash; Keystroke = or ALT+5 &mdash; Character 0000</h1>
{{Article header
|sym={equal}
|def=Test Values For Equality
|ks== or ALT+5
|char=0000
|kb=APLKB-Equal1.png
|kb2=APLKB-Equal2.png}}


[[File:APLKB-Equal1.png]]
[[File:APLKB-Equal2.png]]
==Usage==
==Usage==
Equal is strictly a [[dyadic]] function, there must be a value on both sides of the operator or a VALENCE ERROR will occur. Equal tests the value(s) on the left against the value(s) on the right, and returns 1 for each value that matches, 0 otherwise.
Equal is strictly a [[dyadic]] [[operators|operator]], there must be a value on both sides of the = operator or a VALENCE ERROR will occur. Equal tests the value(s) on the left against the value(s) on the right, and returns 1 for each value that matches, 0 otherwise. Note that unlike the = symbol in a language like C, equal ''never'' assigns a value to a [[variable]], it is only used for comparison purposes. For assignment, the [[Assign]] symbol is used.
==Example==
==Example==
 
:'A'='A'
1
:'a'='A'
0
:2+2=5
0
:1 2 3 4 = 1 0 4 4
1 0 0 1




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[[Category:Boolean Functions]]
[[Category:Boolean Functions]]
[[Category:Dyadic Functions]]
[[Category:Dyadic Functions]]
[[Category:Operators]]

Latest revision as of 10:03, 26 November 2014

= — Test Values For Equality — Keystroke = or ALT+5 — Character 0000


Usage

Equal is strictly a dyadic operator, there must be a value on both sides of the = operator or a VALENCE ERROR will occur. Equal tests the value(s) on the left against the value(s) on the right, and returns 1 for each value that matches, 0 otherwise. Note that unlike the = symbol in a language like C, equal never assigns a value to a variable, it is only used for comparison purposes. For assignment, the Assign symbol is used.

Example

'A'='A'

1

'a'='A'

0

2+2=5

0

1 2 3 4 = 1 0 4 4

1 0 0 1



See Also
System Commands System Variables and Functions Operators


Keyboard
Alt+Shift ⍪ ≡ ≢ ⍒ ⍋ ⌽ ⍉ ⊖ ⍟ ⍱ ⍲ ⍠ ⌹
Alt ⋄ ¨ ¯ < ≤ ∅ ≥ > ≠ ∨ ∧ × ÷
Shift ~ ! @ # $ % ^ & * ( ) _ +
Key ` 1 2 3 4 5 6 7 8 9 0 - =
Alt+Shift ⍷ √ ⍨ ⍸ ⍥ ⍣ ⍞ ⍬ ⊣
Alt ? ⍵ ∊ ⍴ § ↑ ↓ ⍳ ○ π ← → ⊢
Shift Q W E R T Y U I O P { } |
Key q w e r t y u i o p [ ] \
Alt+Shift ∫ ∂ ⌻ ⍢ ⍙ ⍤ ⍫ ⌷
Alt ⍺ ⌈ ⌊ ∞ ∇ ∆ ∘ ‼ ⎕ ⍎ ⍕
Shift A S D F G H J K L : "
Key a s d f g h j k l ; '
Alt+Shift ⊆ ⊇ χ ⍡ ⍭ ⊙
Alt ⊂ ⊃ ∩ ∪ ⊥ ⊤ ⍦ ⍝ ⍀ ⌿
Shift Z X C V B N M < > ?
Key z x c v b n m , . /
NARS 2000 Lang
Tool
Bar 		← → + - × ÷ * ⍟ ⌹ ○ ! ? √ | ⌈ ⌊ ⊥ ⊤ ⊣ ⊢
≡ ≢ < ≤ = ≥ > ≠ ∨ ∧ ⍱ ⍲ ↑ ↓ ⊂ ⊃ ⌷ ⍋ ⍒
⍳ ∊ ⍸ ⍷ ∪ ∩ ⊆ ⊇ ~ § π .. , ⍪ ⍴ ⌽ ⊖ ⍉
/ \ ⌿ ⍀ ⊙ ¨ ⍨ ⍤ ⍣ ⍡ ⍥ ⍦ . ∘ ⍠ ‼ ⌻ ∂ ∫ ⍞ ⎕ ⍎ ⍕
⋄ ⍝ ∇ ∆ ⍙ _ ⍺ ⍵ ¯ ⍬ ∞ ∅
Second Row i j k i j k l g p r v x

[[Category:Mouse Group {{{1}}}|{{{2}}}]]

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